RNA contamination in DNA samples - (Aug/08/2013 )

Hi!

I would like to know if a DNA sample with RNA contamination can be used for transfecting B16, 293H and SH SY5Y cells.

Thanks for the help!

Is the DNA sample plasmid? I don't think that will be a problem. 

Yes, it is!

I thought that only protein/lipids contamination could interfere in this method, but my transfection (using the RNA contaminated DNA sample) didn't work . In parallel, I transfected B16 cells with another plasmid with a EGFP tag (without contamination) and it worked well. And to make things worse, when I used both plasmids, neither the EGFP nor the RNA contaminated worked. 

Maybe I could try a RNAse treatment (again) following by phenol/chlorof extration and ethanol precipitation in order to purify my DNA (because I usually do home made Midiprep  Oh God, I need thoseMidi/Maxiprep Kits!!)...  What do you think about it?

Thank you!